JBL Bags EON15-STRETCH-COVER-BK Stretchy Cover for EON515, 515XT, 305, 315, Black JBL Stretch Covers present a clean appearance for DJ, corporate, or worship applications. Stretchy lycra/spandex blended fabric conforms to speaker shape Acoustically translucent material for excellent sound quality Includes reusable storage pouch to keep covers clean and organized Machine Washable.